Will Walden joins the Mayor after directing the BBC's day-to-day coverage of political news, working closely with the BBC's political editor Nick Robinson. Walden will begin his new role in early July.
Johnson said: ‘He will bring drive, originality and flair to the post of director of comms. It is ever more vital that politicians communicate clearly and honestly with voters about how we are spending their money and how we plan to improve the city.
‘I believe Will has exactly the right skills to help us engage with Londoners. He has enormous experience of politics and a great track record at the BBC. I am thrilled to welcome him on board.’
Walden previously spent three years as the BBC’s senior producer in Washington DC. He has also been a senior political producer to the then political editor Andrew Marr.
He has also worked as a reporter, producer and editor for the BBC, ITN, GMTV and Granada.
Walden said: ‘After 12 fantastic years at the BBC, I'm delighted to be joining Boris Johnson and his team at what is an incredible time for London and for Londoners.
‘A Diamond Jubilee and an Olympic Games represent among the very best that London has to offer. But I know that the Mayor is determined it doesn't end there. He has set out a compelling vision for London's future and it is a privilege to be asked to help shape that vision.’